In view of what Rortv sees as the incommensurability of different vocabularies, he is forced to view truth and knowledge as constructs of whatever vocabulary is seeking them (almost always collective rather than individual). A corollary of this view, however, is that each vocabulary phrases its own inescapable problems. This is a view Rorty clarifies in Contingency, Irony, and Solidarity, where he discusses the nature of truth as a property of statements, not of facts; for example, the color of an object is not true or false, but the statement that such an object is blue has the property of truth or falsehood. He argues further that language is made, not discovered, and as such, truth is a creation, not an extrinsic reality: "since truth is a property of sentences, since sentences are dependent for their existence on vocabularies and since vocabularies are made by human beings, so are truths:*